diff --git a/plat/imx/imx8m/imx8mm/include/imx_sec_def.h b/plat/imx/imx8m/imx8mm/include/imx_sec_def.h
new file mode 100644
index 0000000..6215983
--- /dev/null
+++ b/plat/imx/imx8m/imx8mm/include/imx_sec_def.h
@@ -0,0 +1,216 @@
+/*
+ * Copyright 2020-2022 NXP
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef IMX_SEC_DEF_H
+#define IMX_SEC_DEF_H
+
+/* RDC MDA index */
+enum rdc_mda_idx {
+	RDC_MDA_A53 = 0,
+	RDC_MDA_M4 = 1,
+	RDC_MDA_PCIE_CTRL1 = 2,
+	RDC_MDA_SDMA3p = 3,
+	RDC_MDA_VPU_Decoders = 4,
+	RDC_MDA_LCDIF = 5,
+	RDC_MDA_CSI1 = 6,
+	RDC_MDA_SDMA3b = 7,
+	RDC_MDA_Coresight = 8,
+	RDC_MDA_DAP = 9,
+	RDC_MDA_CAAM = 10,
+	RDC_MDA_SDMA1p = 11,
+	RDC_MDA_SDMA1b = 12,
+	RDC_MDA_APBHDMA = 13,
+	RDC_MDA_NAND = 14,
+	RDC_MDA_uSDHC1 = 15,
+	RDC_MDA_uSDHC2 = 16,
+	RDC_MDA_uSDHC3 = 17,
+	RDC_MDA_GPU = 18,
+	RDC_MDA_USB1 = 19,
+	RDC_MDA_USB2 = 20,
+	RDC_MDA_TESTPORT = 21,
+	RDC_MDA_ENET1_TX = 22,
+	RDC_MDA_ENET1_RX = 23,
+	RDC_MDA_SDMA2p = 24,
+	RDC_MDA_SDMA2b = 24,
+	RDC_MDA_SDMA2_to_SPBA2 = 24,
+	RDC_MDA_SDMA3_to_SPBA2 = 25,
+	RDC_MDA_SDMA1_to_SPBA1 = 26,
+};
+
+/* RDC Peripherals index */
+enum rdc_pdap_idx {
+	RDC_PDAP_GPIO2 = 1,
+	RDC_PDAP_GPIO3 = 2,
+	RDC_PDAP_GPIO4 = 3,
+	RDC_PDAP_GPIO5 = 4,
+	RDC_PDAP_ANA_TSENSOR = 6,
+	RDC_PDAP_ANA_OSC = 7,
+	RDC_PDAP_WDOG1 = 8,
+	RDC_PDAP_WDOG2 = 9,
+	RDC_PDAP_WDOG3 = 10,
+	RDC_PDAP_SDMA3 = 11,
+	RDC_PDAP_SDMA2 = 12,
+	RDC_PDAP_GPT1 = 13,
+	RDC_PDAP_GPT2 = 14,
+	RDC_PDAP_GPT3 = 15,
+	RDC_PDAP_ROMCP = 17,
+	RDC_PDAP_IOMUXC = 19,
+	RDC_PDAP_IOMUXC_GPR = 20,
+	RDC_PDAP_OCOTP_CTRL = 21,
+	RDC_PDAP_ANA_PLL = 22,
+	RDC_PDAP_SNVS_HP = 23,
+	RDC_PDAP_CCM = 24,
+	RDC_PDAP_SRC = 25,
+	RDC_PDAP_GPC = 26,
+	RDC_PDAP_SEMAPHORE1 = 27,
+	RDC_PDAP_SEMAPHORE2 = 28,
+	RDC_PDAP_RDC = 29,
+	RDC_PDAP_CSU = 30,
+	RDC_PDAP_LCDIF = 32,
+	RDC_PDAP_MIPI_DSI = 33,
+	RDC_PDAP_CSI = 34,
+	RDC_PDAP_MIPI_CSI = 35,
+	RDC_PDAP_USB1 = 36,
+	RDC_PDAP_PWM1 = 38,
+	RDC_PDAP_PWM2 = 39,
+	RDC_PDAP_PWM3 = 40,
+	RDC_PDAP_PWM4 = 41,
+	RDC_PDAP_System_Counter_RD = 42,
+	RDC_PDAP_System_Counter_CMP = 43,
+	RDC_PDAP_System_Counter_CTRL = 44,
+	RDC_PDAP_GPT6 = 46,
+	RDC_PDAP_GPT5 = 47,
+	RDC_PDAP_GPT4 = 48,
+	RDC_PDAP_TZASC = 56,
+	RDC_PDAP_USB2 = 59,
+	RDC_PDAP_PERFMON1 = 60,
+	RDC_PDAP_PERFMON2 = 61,
+	RDC_PDAP_PLATFORM_CTRL = 62,
+	RDC_PDAP_QoSC = 63,
+	RDC_PDAP_I2C1 = 66,
+	RDC_PDAP_I2C2 = 67,
+	RDC_PDAP_I2C3 = 68,
+	RDC_PDAP_I2C4 = 69,
+	RDC_PDAP_UART4 = 70,
+	RDC_PDAP_MU_A = 74,
+	RDC_PDAP_MU_B = 75,
+	RDC_PDAP_SEMAPHORE_HS = 76,
+	RDC_PDAP_SAI1 = 78,
+	RDC_PDAP_SAI2 = 79,
+	RDC_PDAP_SAI3 = 80,
+	RDC_PDAP_SAI5 = 82,
+	RDC_PDAP_SAI6 = 83,
+	RDC_PDAP_uSDHC1 = 84,
+	RDC_PDAP_uSDHC2 = 85,
+	RDC_PDAP_uSDHC3 = 86,
+	RDC_PDAP_PCIE_PHY1 = 88,
+	RDC_PDAP_SPBA2 = 90,
+	RDC_PDAP_QSPI = 91,
+	RDC_PDAP_SDMA1 = 93,
+	RDC_PDAP_ENET1 = 94,
+	RDC_PDAP_SPDIF1 = 97,
+	RDC_PDAP_eCSPI1 = 98,
+	RDC_PDAP_eCSPI2 = 99,
+	RDC_PDAP_eCSPI3 = 100,
+	RDC_PDAP_MICFIL = 101,
+	RDC_PDAP_UART1 = 102,
+	RDC_PDAP_UART3 = 104,
+	RDC_PDAP_UART2 = 105,
+	RDC_PDAP_SPDIF2 = 106,
+	RDC_PDAP_SPBA1 = 111,
+	RDC_PDAP_CAAM = 114,
+};
+
+enum csu_csl_idx {
+	CSU_CSL_GPIO1 = 0,
+	CSU_CSL_GPIO2 = 1,
+	CSU_CSL_GPIO3 = 2,
+	CSU_CSL_GPIO4 = 3,
+	CSU_CSL_GPIO5 = 4,
+	CSU_CSL_ANA_TSENSOR = 6,
+	CSU_CSL_ANA_OSC = 7,
+	CSU_CSL_WDOG1 = 8,
+	CSU_CSL_WDOG2 = 9,
+	CSU_CSL_WDOG3 = 10,
+	CSU_CSL_SDMA2 = 12,
+	CSU_CSL_GPT1 = 13,
+	CSU_CSL_GPT2 = 14,
+	CSU_CSL_GPT3 = 15,
+	CSU_CSL_ROMCP = 17,
+	CSU_CSL_LCDIF = 18,
+	CSU_CSL_IOMUXC = 19,
+	CSU_CSL_IOMUXC_GPR = 20,
+	CSU_CSL_OCOTP_CTRL = 21,
+	CSU_CSL_ANA_PLL = 22,
+	CSU_CSL_SNVS_HP = 23,
+	CSU_CSL_CCM = 24,
+	CSU_CSL_SRC = 25,
+	CSU_CSL_GPC = 26,
+	CSU_CSL_SEMAPHORE1 = 27,
+	CSU_CSL_SEMAPHORE2 = 28,
+	CSU_CSL_RDC = 29,
+	CSU_CSL_CSU = 30,
+	CSU_CSL_DC_MST0 = 32,
+	CSU_CSL_DC_MST1 = 33,
+	CSU_CSL_DC_MST2 = 34,
+	CSU_CSL_DC_MST3 = 35,
+	CSU_CSL_PWM1 = 38,
+	CSU_CSL_PWM2 = 39,
+	CSU_CSL_PWM3 = 40,
+	CSU_CSL_PWM4 = 41,
+	CSU_CSL_System_Counter_RD = 42,
+	CSU_CSL_System_Counter_CMP = 43,
+	CSU_CSL_System_Counter_CTRL = 44,
+	CSU_CSL_GPT6 = 46,
+	CSU_CSL_GPT5 = 47,
+	CSU_CSL_GPT4 = 48,
+	CSU_CSL_TZASC = 56,
+	CSU_CSL_MTR = 59,
+	CSU_CSL_PERFMON1 = 60,
+	CSU_CSL_PERFMON2 = 61,
+	CSU_CSL_PLATFORM_CTRL = 62,
+	CSU_CSL_QoSC = 63,
+	CSU_CSL_MIPI_PHY = 64,
+	CSU_CSL_MIPI_DSI = 65,
+	CSU_CSL_I2C1 = 66,
+	CSU_CSL_I2C2 = 67,
+	CSU_CSL_I2C3 = 68,
+	CSU_CSL_I2C4 = 69,
+	CSU_CSL_UART4 = 70,
+	CSU_CSL_MIPI_CSI1 = 71,
+	CSU_CSL_MIPI_CSI_PHY1 = 72,
+	CSU_CSL_CSI1 = 73,
+	CSU_CSL_MU_A = 74,
+	CSU_CSL_MU_B = 75,
+	CSU_CSL_SEMAPHORE_HS = 76,
+	CSU_CSL_SAI1 = 78,
+	CSU_CSL_SAI6 = 80,
+	CSU_CSL_SAI5 = 81,
+	CSU_CSL_SAI4 = 82,
+	CSU_CSL_uSDHC1 = 84,
+	CSU_CSL_uSDHC2 = 85,
+	CSU_CSL_MIPI_CSI2 = 86,
+	CSU_CSL_MIPI_CSI_PHY2 = 87,
+	CSU_CSL_CSI2 = 88,
+	CSU_CSL_SPBA2 = 90,
+	CSU_CSL_QSPI = 91,
+	CSU_CSL_SDMA1 = 93,
+	CSU_CSL_ENET1 = 94,
+	CSU_CSL_SPDIF1 = 97,
+	CSU_CSL_eCSPI1 = 98,
+	CSU_CSL_eCSPI2 = 99,
+	CSU_CSL_eCSPI3 = 100,
+	CSU_CSL_UART1 = 102,
+	CSU_CSL_UART3 = 104,
+	CSU_CSL_UART2 = 105,
+	CSU_CSL_SPDIF2 = 106,
+	CSU_CSL_SAI2 = 107,
+	CSU_CSL_SAI3 = 108,
+	CSU_CSL_SPBA1 = 111,
+	CSU_CSL_CAAM = 114,
+};
+
+#endif /* IMX_SEC_DEF_H */